321220112010 has 192 divisors, whose sum is σ = 916249190400. Its totient is φ = 71843587200.

The previous prime is 321220111999. The next prime is 321220112027. The reversal of 321220112010 is 10211022123.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14861191 + ... + 14882789.

It is an arithmetic number, because the mean of its divisors is an integer number (4772131200).

Almost surely, 2^321220112010 is an apocalyptic number.

321220112010 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 321220112010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458124595200).

321220112010 is an abundant number, since it is smaller than the sum of its proper divisors (595029078390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321220112010 is a wasteful number, since it uses less digits than its factorization.

321220112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21841 (or 21834 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 321220112010 its reverse (10211022123), we get a palindrome (331431134133).

The spelling of 321220112010 in words is "three hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, ten".